interesting...Alternator and PS driven off of driveshaft...IMSA 90
06-26-2006, 02:19 PM
#11
"Acceleration is proportional to force and inversely proportional to mass."
-Newton's Second Law of Motion
Acceleration = Force divided by Mass.
The effect would be that there is less mass for the engine to accelerate rotationally.
Acceleration = Force divided by Mass.
The effect would be that there is less mass for the engine to accelerate rotationally.
06-26-2006, 02:42 PM
#12
AudiWorld Super User
Join Date: Mar 2005
Posts: 2,857
Likes: 0
Received 0 Likes
on
0 Posts
Way to talk out of your depth there. Do you really want to use a linear equation...
to argue angular quantities?
The alternator and pump and whatever else you'd like to run off of the engine, driveshaft, or any driveline location of your choosing require a certain amount of power input to provide the desired output. That power has to come from somewhere, namely the chemical energy stored in your gas tank.
If you want to reduce the power required to run pumps and alternators, you have to run them at a lower speed, and suffer the reduced output, or else design a higher-efficiency pump system that can make the desired output with lower power input.
You can't just erroneously cite Newton and make more horsepower. Reminds me of politicians misinterpreting the Bible to justify their actions.
Sorry, I got kinda pissy there. But there's no free lunch with this stuff. Unless you switch to electronic steering assist like new Audis!
The alternator and pump and whatever else you'd like to run off of the engine, driveshaft, or any driveline location of your choosing require a certain amount of power input to provide the desired output. That power has to come from somewhere, namely the chemical energy stored in your gas tank.
If you want to reduce the power required to run pumps and alternators, you have to run them at a lower speed, and suffer the reduced output, or else design a higher-efficiency pump system that can make the desired output with lower power input.
You can't just erroneously cite Newton and make more horsepower. Reminds me of politicians misinterpreting the Bible to justify their actions.
Sorry, I got kinda pissy there. But there's no free lunch with this stuff. Unless you switch to electronic steering assist like new Audis!
06-26-2006, 03:46 PM
#16
The IMSA 20vt goes well beyond that....Mechanical head, not hydraulic...
Try probably north of 8k rpm pretty easily. The stock hydro heads of the 20v/20vt's all run to 7200-7400 no problem. With the huge turbo on the 2.1L 20vt IMSA motor, they HAVE TO rev the snot out of it to make the power (650-720hp, aka as much as the R8 and R10's make).
Plus, they did the same thing on the TransAm cars IIRC. Old news ;-)
Plus, they did the same thing on the TransAm cars IIRC. Old news ;-)
06-26-2006, 04:33 PM
#18
You have to go back in time....
back to when Audi Engineers developed those cars.
Then grasp their logic in placing those components where they did, and their explanation of what effect on the engine it would have.
While you may not see or understand why, its there.
It was once explained to me by the Technical Director of Group 44. ;O)
Then grasp their logic in placing those components where they did, and their explanation of what effect on the engine it would have.
While you may not see or understand why, its there.
It was once explained to me by the Technical Director of Group 44. ;O)
